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Comparison of pipe models to simulate legionella concentration in domestic hot water
The production of Domestic Hot Water (DHW) dominates the total energy demand in well-insulated and airtight buildings because DHW is produced above 55- 60°C to kill Legionella pneumophila. This temperature has a negative effect on the efficiency of DHW production units. A simulation model is developed that allows to investigate the infection risk for Legionella pneumophila in the design phase of a DHW system and to test the effectiveness of thermal disinfection. Different existing Modelica pipe models are investigated to select useful models that can be extended with equations for simulation of bacterial growth in DHW. When implementing the adapted pipe model in a DHW recirculation system, simulation results show that energy use can be reduced by 34% without increasing infection risk. By developing a simulation model, HVAC designers will be able to assess the infection risk associated with their design and to optimize temperature regimes to reduce the energy demand for DHW production.
Comparison of pipe models to simulate legionella concentration in domestic hot water
The production of Domestic Hot Water (DHW) dominates the total energy demand in well-insulated and airtight buildings because DHW is produced above 55- 60°C to kill Legionella pneumophila. This temperature has a negative effect on the efficiency of DHW production units. A simulation model is developed that allows to investigate the infection risk for Legionella pneumophila in the design phase of a DHW system and to test the effectiveness of thermal disinfection. Different existing Modelica pipe models are investigated to select useful models that can be extended with equations for simulation of bacterial growth in DHW. When implementing the adapted pipe model in a DHW recirculation system, simulation results show that energy use can be reduced by 34% without increasing infection risk. By developing a simulation model, HVAC designers will be able to assess the infection risk associated with their design and to optimize temperature regimes to reduce the energy demand for DHW production.
Comparison of pipe models to simulate legionella concentration in domestic hot water
Van Kenhove, Elisa (author) / Janssens, Arnold (author) / Laverge, Jelle (author) / Barnaby, Charles S / Wetter, Michael
2017-01-01
Proceedings of the 15th IBPSA conference ; ISSN: 2522-2708 ; ISBN: 978-1-7750520-0-5
Conference paper
Electronic Resource
English
DDC:
690
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